Excavating system



' 2 I 3 493.651 May 13 19 4 g. H. SWENSON EXCAVATING SfSTE-M' Filed amv. 1923 6. I1 Hzuen son WITNESS:

ATTORNEY Patented May 13, i924,

CHARLES H. SWEHSON, OE SLIDELL, LOUISIANA.

EXCAVATING- SYSTEM.

Application filed July 7,

To (/U 70/907 it may w nce/1m.

Be it known that I. Gunners H. SWENSON, a citizen of the United F ts-teeresiding at Eilidell, in the parish o1 St. Tammany and State ofLouisiana, have invented new and useful improvements in Excavating Systoms, of which the following is n SPBClfiCZL- tion.

This invention relates to the process of excavating gravel and send andhas for an object the provision of improved means "for this purposewhich will increase the output and in addition prevent the material fromclogging the casing.

Another object of the invention is the provision of :1 process of thischaracter which is simple, reliable and economical in operation andwhich may be easily installed.

With the above and other objects in view the invention further includesthe following): novel features and details of construction to behereinafter more fully described, illustrated in the accompanyingdrawing and pointed out in the zu'jpei'uled claim.

In the drawing the ligrure shown is e diagram illustrating; the process.

Referring" in detail to the drawing, the reference character it)indicates a casing which extends into the ground, the top surface ofwhich is indicntetil at 11. The bottom end of the casing 10 extends inton strata of gravel. and water. indicated at 12, while the natural waterlevel. within the casing 10 is indicated at 13.

The casing extends tl'irougzh the platform M and its upper end is incommunication with an overflow conduit 15.

Extending downwardly within the casing end having its outer endconnected to a pressure pump is a water line 16, whose Serial No.650,140.

lower outlet end extends below the bottom of the casing 10 and into thestrata 12 of gravel and writer.

i will be readily understood the water will be forced outward throughthe top of the casing 10 and through the conduit 15 b l1 \Cl1dI1llCpressure through the pipe 16, the said water carrying with it the graveland sand, where the latter is present.

One of the novel features of the invention resides in the introductioninto the casing of air under pressure and for this purpose there isprovided an air supply pipe 17 through which air under pressure isforced. The discharge end of the pipe 17 is located below the water line13 and above the discharge end of the pipe 16 and the compressed airforces the water and gravel upward and prevents the casing frombecoming; clogged with the gravel and sand due to this pressure.

Having described the invention whatis clz-iimed is in excavatingapparatus comprising a (tie rig open M the bottom and adapted to extenddownwardl v within the material to be removed, it discl'ierg'e conduitat the upper end of the casing. a water pipe extendin downwardly throughthe casing with its lower end disposed below the bottom of the casing;and its upper end adapted to be connected to the source of water underpre ure, a compressed air supply pipe extending downwardly into thecasing and en upwardly disposed nozzle at the lower end of the air pipe.

.l'u testimony whereof l ellix my signature.

Cl'llilllil lid i. SWEJSON.

